JSON diff

JSON & data

Compare two JSON documents and highlight structural differences.

Updated May 26, 2026

Compare two JSON documents and highlight structural differences.

Input format: JSON A, then line --- separator, then JSON B

Output

role: "dev" -> "lead"

Quick start

Enter input and view computed output.

In-depth guide

Compare two JSON documents and highlight structural differences. This tool is designed for fast local processing and practical day-to-day use.

Paste input, review output instantly, then copy it for your workflow.

Use one value per line for structured inputs. Common separators are handled gracefully.

Processing runs in your browser tab for the MVP workflow, with no mandatory upload step.

Validate the output before committing it, especially when fixing almost-valid input.
Escaping, comments, trailing commas, and mixed encodings are the usual source of surprising results.
For production config, keep a copy of the original until the consuming system accepts the rewritten file.

Does this run in my browser?

Yes. Processing runs client-side for this tool's MVP flow.

Can I paste multiline input?

Yes. Multiline input is supported where relevant.

Can I copy the output?

Yes, use the Copy action in the output panel.

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